DNxHD 444 vs Prores 4444

Google failed me, and my lunch break is only that long.
I am about to grade a feature, and was supposed to get prores 4444. Now it looks like it might be DNxHD 444 instead. AFAIK it's the same bit rate and everything, and I will not use any alphas.

So my question is; has anyone done a comparison in quality between the two? Worked with them, conformed with them? I figure they are virtually indentical, but the DNxHD-version is not burdened with an Apple-only mantra?

The files will come from a conform-session on Resolve, where the original files were ProRes straight from the Alexa camera. However, with the current difficulty to export Prores from Windows we tried DNxHD.

I not add another round of encoding to already existing ProRes.
Either ask for the original Alexa files used and reconform
or ask for DPX.
Maybe show them a test how double encode will look .
If they dont care, why should you :)

In theory they should be the same in different containers. But why not stick to the camera-files? Your Windows will read them. And then you can finish of by delivering dpx or dnxhd depending on the receiving platform.

Ahhh , so we are talking Arri Raw now ?
Well, 80 TB is something..
But even if they encode everything to 3k DPX it won't be more than 4TB if you go for selected takes.
My point was , it needs some planing to not get lost in the data jungle when doing a feature, and simulating it on a 5 min piece can be the difference between a smooth ride and a vacation in post pro hell :)